Originally Posted by
Campag4life
Surprising. You still don't get the point of distinction. There is no difference between BB/PF30 and the BB's of the frames you mention other than shell width. BB shell width is nebulous in the scope of discussion. The point is pretty much all BB's now have press in bearings. You said so yourself. Slight vagaries are incidental in terms of design robustness, though non Acetal Press Fit BB's aka alloy cup press fit bearing BB's tend to be easier to set up and most reliable especially compared to using loose bearings with Acytal bushing BB's.
I believe I do and, as you mentioned, said as much. I agree with you in that I believe Press fit, in some form, is here for the foreseeable future but there are considerable variations in how the bearings are captures that goes beyond shell width.
I think this is the point of distinction and so puts BB30 in a specific category. Can we agree on that?
The point of the thread was specific to BB30 and my original point was in response to your point suggestion that manufacturers were moving back to it as a standard. I suggested otherwise and gave examples.
I also stated how it has become a standard for open mold frames along with BSA but newer, higher end open mold frames will also offer PF30 as an option. I think this is a lagging but key indicator on the overall direction of the industry in terms of which standards are or are not being adopted.